Loanfinder is a ****

Loanfinder is the worst thing that ever happened to me. Signing up there is no mention of any payment, then boom R395 was debited from my account, I sent a few emails to their customer support but nothing done, I want to opt out from the service and would like them to reverse and stop making debits in my account. I'm highly frustrated and stressed cause Loanfinder has affected my credit record